Cable equalizer for elevators and the like



Dec. 15, 19251 J, W. HOBBS CABLE EQUALIZER FOR ELEVATORS AND THE LIKE Filed May 27, 1924 INVENTOR. Jo/wv m #055:

A TTORNEYS.

Patented Dec. 15, 1925.

1 UNITED. STATES ass e I PATENT OFFICE.

JOHN W. HOBBS, OF INDIANAPOLIS, INDIANA, ASSTGNOR TO THE HOME ELEVATOR COMPANY, OF INDIANAPOLIS, INDIANA.

CABLE EQUALIZER FOR ELEVATORS AND THE LIKE.

Application filed May 27, 1924. Serial No. 716,161.

To all whom 2'2, may concern: I

Be it known that I, JO N W. HOBBS, a citizen of the United States,'and a resident of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Cable Equalizer for Elevators and the like; and I do hereby declare that the following is a full, clear, and exact d'escription thereof, reference being had to the accompanying drawings, in which like numorals refer to like parts.

This invention relates to an elevator support, and particularly to the equalizing connection of the supporting cables, whereby the weight of the elevator will be caused to be equally distributed between the several supporting cables. In this connection reference may be had to my Letters Patent No. 1,500,816 issued July 8, 1924..

It is the object of this invention to arrange a number of cables, four, six, or more and so connect the ends of the cables to the equalizing weight and elevator beam that their respective weights will be equally distributed-among the several cables.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

Fig. 1 is a perspective view showing the elevator and a portion of the counter-balance weight with their overhead supporting drum. Fig. 2 is a section taken on line 2-2 of Fig. 1, showing a side elevation of the pulley mounting between the elevator supporting beams. Fig. 3 is a section taken on line 33 of Fig. 1 showing the cable connections and pulley mounting between the weight supporting bars. Fig. 4 is a side elevation of one of the pulley blocks. Fig. 5 is an end elevation thereof.

In the drawings there is shown an elevator structure comprising an elevator plat form supported by vertical channel iron uprights 11 and braced by the tie-bars 12. The upper ends of the channel irons 11 are secured so as to be suspended from the pair of spaced channel iron cross beams 13. Pivotally mounted between the spaced cross beams 13 there are fulcrum levers 14 and 15 each being fulcrumed upon the pins 16 extending through the cross beams '13 and the levers 14 or 15 intermediate their ends. Said levers are mounted in pairs spaced apart and having their adjacent ends pivotally connected to a common pulley block 17, there being provided the pulley blocks 18 which are pivotally mounted between the far ends of said levers.

The counter weight 20 is rigidly secured between the straps 21, said straps embracing another set of equalizing levers comprising the pairs of levers 22 and 23 fulcrumed intermediate their ends upon the pins 24: which are supported between said straps 21.

In the same manner as above described, the adjacent ends of the levers embrace and are pivoted to the common pulley block 25,

of the suitable supporting bracket structurev 32. As shown herein the drum 31 is pro vided with six cable grooves extending about its periphery forreceiving the cables 33 adapted to be supported thereby.

The pulleyblocks 17, 18, 25, and 26 are each provided with a pair of cable receivinggrooves 3 1 and 35 extending about their periphery. The grooves 34: and 35 are each provided with a diagonally extending bore 36 lying in the same plane and projecting from the groove to the end surfaces of the pulley as shown in Figs. 1 and 5. Each block receives two cables, one for each of the grooves 84 and 35. The cables so received by the blocks extend about opposite sides thereofsubstantially three-fourths of the periphery when in normal position. Each cable terminates'with the block, having its free end extending through the bore 36 from its respective groove to the adjacent end of the block where it is held by an enlargement of the end formed in any suitable manner.

It will be observed that the same stress will be received by each of the six cables shown herein in the counterbalancing of the elevator and weight 20, by reason of the connections between each pair of cables with their respective pulley blocks; and as between the pairs of cables, by reasonof the fulcrum support of the pulley blocks. An excess pull applied to the cable a will be transferred to the cable 6 through'their respective connections with the blocks 18 and 26, said blocks operating about their pivotal mountings. The same is true of the pairs of cables cal and cf. On the other hand if an excessive pull is applied to either of the three pairs of cables, they will be equalized and transferred one to the other through the relative position taken by the blocks 1.7. 18, 25, and 26 about the fulcrum points 16 and 24. Obviously this applies to variations in the lengths of the respective cables or any stretching thereof. In view of the above it will be observed that not only will there be equal distribution of weight between the several cables, but the weight being transmitted through two or more connections with the cross beams, each of the ables is attached individually at both ends. in event one gives way the remaining cables will assume the load and equalize themselves accordingly.

The invention claimed is:

1. A cable equalizing attachment for elevators, comprising a supporting beam, a pair of levers :tulcriuned to said beam between their ends and pivotally connected to each other at their adjacent ends, pulley blocks pivotally mounted on the extreme ends of said levers for receiving cables, and a single pulley block mounted on the pivotal connection of the adjacent ends of said levers for receiving one set of cables.

2. cable equalizing attachment for elevators, comprising a supporting beam. a pair of levers fulcrumed to said beam between their ends and pivotally connected to each other at their adjacent ends, a pulley block pivotally mounted on each of the extreme ends of said levers by which sail cables are adapted to partially pass and have their ends connected, and a common pulley block mounted on the pivotal connection of the adjacent ends of said levers about which a Jail" of said cables are adapted to partiat ly extend in opposite direction and have their ends fixedly connected.

3. A cable equalizing attachment for con necting the ends of the cables with an elevator and its counter-weight, comprising a pair of levers having their adjacent ends pivotally connected and fulcrumed between their ends to said elevator, a similar pair of levers having their adjacent ends pivotally connected and tnlcrun'ied between their respective .ends to said counterweight. pulley blocks pivotall mounted on the extreme ends of said levers, a pulley block pivotally mounted on the pivotal connections betwen the adjacent ends thereof, two or more of said cables having one end directly connected with the last iueir tioned pulley blocks on said elevator and counter-weight, and the other cables partially passing about and having their ends connected with the first mentioned pulley blocks.

4:. A cable equalizing; attachment for elevators. comprising a pair 0t elevator sup porting cross beams, a pair oit equalizing levers pivotally mounted between their ends between said said cross beams, a second pair of equalizing le ers pivotally mounted in? tween their ends between said cross beams, said equalizing levers being spaced apart. a common pulley blocli pivotally mounted between both pairs of levers for pivotally connecting" the adjacent ends thereof together. pulley blocks pivotally mounted between the extreme ends of said pairs of equalizing levers, and a plurality of cablehaving their ends fixedly connected to said pulley blocks and passing partially about the same for supporting the elevator, said cables being: equalized by their respective pulley blocks and said equalizing levers.

In witness whereof, I have hereunto atfixed my signature.

JOHN HOBBS. 

